Visual/Physical Inspection
WARNING: This page is about a different car, the 2002 Buick Regal and 2002 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.
- Inspect for aftermarket devices which could affect the operation of the rear window defogger and the automatic Day/Night feature of the inside rearview mirror.
- Inspect the easily accessible system components for obvious damage or for conditions which could cause the symptom.